Recording medium identification apparatus, information reproduction apparatus and information recording apparatus

• Main Authors: HASHIZUKA YOSHIHIRO, FUKAMACHI JUNICHI, NISHIO YOSHIMICHI, IWANO HIDEYASU, GOTO HIROKI
• Format: Patent
• Language: English
• Published: 18.11.2004
• Edition: 7
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

A recording-medium-identification apparatus that emits a light beam onto a recording medium, is provided with: a light-receiving device which receives said reflected light beam that is reflected from said recording medium; a first extraction device which extracts a specified wobble-frequency signal from said output received-light signal that corresponds to the wobble frequency of the recording tracks on a specified recording medium from among a plurality of types of said recording media; a second extraction device which extracts another wobble-frequency signal from said output received-light signal that corresponds to the wobble frequency of the recording tracks on another recording medium other than the said specified recording medium from among a plurality of types of said recording media; and an identification device which uses at least said specified wobble-frequency signal or said other wobble-frequency signal to identify the type of said recording medium.